Data sheet
Pressure switch
KP
The KP pressure switches can be used as safety
switches against too low a suction pressure and / or
too high a discharge pressure in refrigeration and
air conditioning systems. They can also be used
to start / stop compressors and fans for air-cooled
condensers.
They are available in both single and dual versions
and include a single pole double throw (SPDT)
switch.
Features • Ultra-short bounce time thanks to snap-action
function (reduces wear to a minimum and
increases reliability)
• Available with gold-plated contacts
• SPDT switch design
Offers open or close switching action on pressure
rise or fall
• Fail safe double bellows
Prevent refrigerant loss and system
contamination - standard on KP 7 and KP 17
pressure switches
• Convenient manual trip feature
To test electrical contact function
- no tools needed
UL listed for USA and Canada, file E31024Approvals
© Danfoss | DCS (rm) | 2019.09
• Pressure wire connectors
For easy electrical wiring
• No spade or lug terminals required
• Integral 1⁄2 NPSM swivel cable connector
Allows direct attachment of 1⁄2 in
male pipe thread connector
• Lockplate
Prevents tampering with range
and differential settings
• Universal mounting hole patterns
DKRCC.PD.CD0.1E.22 | 1
Data sheet | Pressure switch, type KP
Technical data
Ambient temperature -40 – 149 °F (175 °F for maximum 2 hours)
Maximum working pressure
Maximum test pressure
Switch Single pole changeover switch (SPDT)
Contact load
Terminal D, dual switches 240 V, 50 VA
Cable entry
Integral 1⁄2 in female NPSM swivel cable connector
allows direct attachment of 1⁄2 in
male pipe thread connector.
LP: MWP = 245 psig
HP: MWP = 465 psig
LP: pe = 285 psig
HP: pe = 510 psig
120 V AC: 16 FLA, 96 LRA
240 V AC: 8 FLA, 48 LRA
240 V DC: 12 W pilot duty
Enclosure
~NEMA 1
This grade of enclosure is obtained when the units
without top cover are mounted on a flat surface or
bracket. The bracket must be fixed
to the unit so that all unused holes are covered.
~ NEMA 2
This grade of enclosure is obtained when the units
with top cover are mounted on a flat surface or
bracket. The bracket must be fixed to the unit so
that all unused holes are covered.
Materials in contact with the medium
Control type Material
KP 1, KP 2, KP 5, KP 7,
KP 15, KP 17, KP 25
KP with cap. tube Copper SF-Cu, no. 2.0090 to DIN 1787
Tin bronze, no. CW452K, EN 1652
Nickel plated free cutting steel, no. 1.0737 / 1.0718 to EN 10277
© Danfoss | DCS (rm) | 2019.09
DKRCC.PD.CD0.1E.22 | 2
Data sheet | Pressure switch, type KP
A60-1032.10
Technical data Electrical wiring
Low or high pressure
SPDT - signal pole double throw
Pressure / Temperature
Rise
Load
Cut-in
(te rm.1- 4)
Load
or or
Cut-out
(te rm.1-2)
421 421
Load
Cut-out
(te rm.1- 4)
Danfoss
Drop
Load
Cut-in
(te rm.1-2)
Load
Signal option
Line
Dual (low and high) pressure,
LP signal
LP - signal option
Load
Line
Dual (low and high) pressure,
LP and HP signal
LP - signal option
Load
A2115
A2113
Line
Wring instruction
Line
Low pressure, LP: KP 1 and KP 2 High pressure, HP: KP 5, KP 7W and KP 7B
Dual (low and high) pressure:
KP 15, KP 17W, KP 17B and KP 25
Dual (low and high) pressure:
KP 15, KP 17W, KP 17B and KP 25
HP - signal option
Bellows movement
on pressure rise
Bellows movement
on pressure drop
© Danfoss | DCS (rm) | 2019.09
Metric conversions
1 psi = 0.07 bar
5
⁄9 (t1 °F - 32) = t2 °C
DKRCC.PD.CD0.1E.22 | 3
Data sheet | Pressure switch, type KP
Ordering
For R22, R134a, R404A, R407A, R407C, R407F, R422B, R422D, R448A, R449A, R450A, R452A, R507A, R513A
For complete list of approved refrigerants, visit www.products.danfoss.com and search for individual code numbers, where refrigerants are
listed as part of technical data.
Low pressure (LP) High pressure (HP) Reset
Typ e Pressure
Regulating
range
[inHg]
[psig]
Differential
∆p
Regulating
range
Differential
∆p
Low
pressure
[psi] [psig] [psi] [LP] [HP]
High
pressure
Contact functio
KP 1 Low 6 in – 108 10 – 58 – – Auto – SPDT 06 0-200191 –
KP 1 Low 6 in – 108 10 – 58 – – Auto –
SPDT
KP 1 Low 27 in – 100 10 – – Man. (Min.) – SPDT – 060-205291 1)
KP 2 Low 6 in – 50 6 – 32 – – Auto –
KP 2 Low 6 in – 50 6 – 32 – – Auto –
SPDT
SPDT
06 0-20136 6 –
KP 5 High – – 115 – 465 25 – 85 – Auto SPDT 060 -201491 –
KP 5 High – – 115 – 465 25 – 85 – Auto
KP 7W 2) High – – 115 – 465 58 – 140 – Auto
KP 7W 2) High – – 115 – 465 58 – 140 – Auto
KP7B 2) High – – 115 – 465 58 – Man. (Max.)
KP7B 2) High – – 115 – 465 58 – Man. (Max.)
SPDT
SPDT
SPDT
SPDT
SPDT
060-20 0391 –
060-20 0491 –
KP 15 Dual 6 in – 108 10 – 58 115 – 465 58 Auto Auto SPDT/w. L P signal 060-200891 –
KP 15 Dual 6 in – 108 10 – 58 115 – 465 58 Auto Auto SPDT/w. L P signal – 060-205891
KP 15 Dual 6 in – 108 10 – 58 115 – 465 58 Auto Man. (Max.) SPDT/w. L P signal – 060-205991
KP 15 Dual 6 in – 108 10 – 58 115 – 465 58 Man. (Min.) Man. (Max.) SPDT/w. L P signal – 060-206091
KP 15 Dual 6 in – 108 10 – 58 115 – 465 58 Auto Auto
KP 15 Dual 6 in – 108 10 – 58 115 – 465 58 Auto Man. (Max.)
KP 17 W 2) Dual 6 in – 108 10 – 58 115 – 465 58 Auto Auto
1
) With dial knob
2
) With fail safe double bellows
SPDT/w. LP + HP
signal
SPDT/w. LP + HP
signal
SPDT/w. LP + HP
signal
060-202691 –
Code no.
connection
1
⁄4 in flare
Cap. tube
flare nut 36 in
– 060-205191
– 060-206391
– 060-206491
– 060-205391
– 060-205491
– 06 0-203191
– 060 -202991
w. 1⁄4 in
Metric conversions
1 psi = 0.07 bar
5
⁄9 (t1 °F - 32) = t2 °C
© Danfoss | DCS (rm) | 2019.09
DKRCC.PD.CD0.1E.22 | 4
Data sheet | Pressure switch, type KP
Design
1. Low pressure setting
spindle, (LP)
2. Differential setting
spindle
3. Main arm
5. High pressure setting
spindle, (HP)
7. Main spring
8. Differential spring
9. Bellows
10. LP connection
11. HP connection
12. Switch
13. Terminals
14. Earth terminal
15. Cable entry
16. Tumbler
18. Locking plate
19. Arm
30. Reset button
Pressure switch, type KP
FW
KP 1, KP 2, KP 5
KP 15, KP 25 flare KP 1, KP 2, KP 5, KP 15, KP 25, KP 7W,
KP 7B, KP 17W, capillary tube
FW
FW
© Danfoss | DCS (rm) | 2019.09
The switch in the KP has a snap-action
function where the bellows move only when
the cut-in or cut-out value is reached.
The bellows are connected to the low
or high pressure side of the system through
connection (10) or (11).
The design of the KP gives the following
advantages:
− high contact load
− ultra-short bounce time
− high resistance to pulsation
− vibration resistance up to 4 g in
the range 0 – 1000 Hz
− long mechanical and electrical life
DKRCC.PD.CD0.1E.22 | 5
Data sheet | Pressure switch, type KP
Design
(continued)
1. Pressure setting
spindle, (LP)
2.Differential setting spindle
3. Main arm
5. Pressure setting
spindle, (HP)
15.Cable entry
18.Locking plate
KP 7W (KP 7B), flare
KP 17W (KP 17B), flare
KP 7W (KP 7B), capillary tube
© Danfoss | DCS (rm) | 2019.09
The KP with designations W or B have been tested
and approved by TÜV (Germany) in accordance
with EN 12263.
Versions with designation W will cut in
automatically when the pressure has fallen
to the setpoint minus the differential.
Versions with designation B can be cut in
manually using the external reset button when:
KP 1 – the pressure has increased
to 10 psi above the setpoint.
KP 7 – the pressure has fallen 58 psi
below the setpoint.
KP 7 and KP 17 are equipped with fail-safe double
bellows; a regulation bellows and an outer bellows.
The double bellows system protects against loss of
system charge in the event of a bellows rupture.
A rupture in the outer bellows will cause the
control to trip approximately 43 psi lower than the
actual control setting. This features provides a
warning without a loss of charge.
All KP pressure switches, including those which are
PED-approved, operate independently of changes
in the ambient temperature around the control
housing. Therefore the set cut-out pressure and
differential are kept constant provided the
permissible ambient temperatures are not
exceeded.
DKRCC.PD.CD0.1E.22 | 6
Data sheet | Pressure switch, type KP
Terminology
Setting Pressure switches with automatic reset – LP:
Metric conversions
1 psi = 0.07 bar
Reset
1. Manual reset:
Units with manual reset can only
be reset during operation by activation
of the reset button.
2. Automatic reset:
After operational stop, these units reset
automatically.
Maximum working pressure
The Maximum working pressure is determined by
the pressure that can be safely allowed
in the refrigerating system or any of the units
within it. The maximum working pressure is
designated MWP.
Test pressure
The test pressure is the pressure used
in strength tests and / or leakage tests on
refrigerating systems or individual parts in systems.
The test pressure is designated Pe.
Set the LP start pressure on the “CUT-IN” scale
(range scale). One rotation of the low pressure
spindle ~10 psi. Set the LP differential on the “DIFF”
scale. One rotation of the differential spindle ~ 3
psi. The LP cut-out pressure is the LP cut-in pressure
minus the differential.
Note:
The LP cut-out pressure must be above
absolute vacuum pe = 30 in Hg.
If compressor will not stop at low cut-out pressure,
check whether the differential value is set at too
high a value!
“Snap function”
A certain contact force is maintained until
irrevocable “snap” is initiated. The time during
which the contact force approaches zero is thus
limited to a very few milliseconds. Therefore
contact bounce cannot occur as a result of, for
example, slight vibrations, before the cut-out point.
Contact systems with “Snap function” will change
over even when micro-welds are created between
the contacts during cut-in. A very high force is
created during cut-out to separate the contacts.
This force immediately shears off all the welds.
Thus the cut-out point of the unit remains very
accurate and completely independent of the
magnitude of the current load.
Pressure switches with automatic reset – HP:
Set the HP cut-out pressure on the “CUT-OUT”
scale. One rotation of the HP spindle ~ 33 psi.
Set the HP differential on the “DIFF” scale.
One rotation of the differential spindle ~ 4 psi. The
HP cut-in pressure is the HP cut-out pressure minus
the differential. Pressure switches with manual
reset. Set the cut-out pressure on “CUT-OUT” scale
(range scale). Low pressure controls can be
manually reset when the pressure is equal to the
cut-out pressure plus the differential.
High pressure switches can be manually reset when
the pressure is equal to the cut-out pressure minus
the differential.
Cut-in and cut-out pressures for both the LP and HP
sides of the system should always be checked with
an accurate pressure gauge.
© Danfoss | DCS (rm) | 2019.09
DKRCC.PD.CD0.1E.22 | 7
60-950.13
60-991.14
Data sheet | Pressure switch, type KP
Dimensions [in]
and weight [lb]
Flare connection
Danfoss
60-760.13
KP 1, KP 2 and KP 5 KP 15 and KP 25
Danfoss
60-1014.12
Danfoss
60-908.11
Danfoss
60-1015.14
Net weight:
KP 1, KP 2, KP 5 and KP 7:
approx. 0.7 lbs.
KP 15, KP 17 and KP 25:
approx. 1.1lbs.
Metric conversions
1 in = 25.5 mm
1 lb = 0.454 kg
KP 7W and KP 7B KP 17W and KP 17B
Capillary tube connection
Danfoss
KP 1, KP 2, KP 5, KP 7W and KP 7B
KP 15, KP 17W, KP 17B and KP 25
Danfoss
© Danfoss | DCS (rm) | 2019.09
DKRCC.PD.CD0.1E.22 | 8
60-1011.13
Danfoss
60-1011.13
Dimensions [in]
KP single switches, rear side
KP dual switches, rear side
Danfoss
60-1023.14
Danfoss
60-1024.14
© Danfoss | DCS (rm) | 2019.09
Wall bracket Angle bracket
Danfoss
DKRCC.PD.CD0.1E.22 | 9
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